公开(公告)号：US20230344691A1

公开(公告)日：2023-10-26

申请号：US18251490

申请日：2021-10-20

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Toni LEVANEN ,  Juha YLI-KAAKINEN

IPC: H04L27/26

CPC classification number: H04L27/26025 ,  H04L27/26412

Abstract: According to an aspect, there is provided an apparatus comprising for performing the following. The apparatus receives a stream of orthogonal frequency division multiplexing symbols and associated cyclic prefixes produced by at least one orthogonal frequency-division multiplexing modulator of a radio transmitter or transceiver. The apparatus divides said stream into a plurality of overlapping processing blocks of a first length. At least one of the plurality of overlapping processing blocks comprises a non-overlapping section having values corresponding to a segment of said stream. The dividing comprises adjusting a length of the non-overlapping section at least based on whether a cyclic prefix is comprised in said segment and, if this is true, on a length of said cyclic prefix. The apparatus filters the plurality of overlapping processing blocks using fast convolution processing and concatenates filtered processing blocks to form an output signal for transmission using the radio transmitter or transceiver.

公开(公告)号：US20210399777A1

公开(公告)日：2021-12-23

申请号：US17284652

申请日：2018-10-17

Applicant: Nokia Solutions and Networks Oy

Inventor： Tero Johannes IHALAINEN ,  Toni LEVANEN ,  Jukka Olavi TALVITIE

IPC: H04B7/06

Abstract: According to an aspect, there is provided a beamforming processing apparatus for a radio transmitter or receiver including an antenna array. The beamforming processing apparatus includes circuitry configured for maintaining, in a database, information on radiation properties of the antenna array and probability density functions for target device positions. The radiation properties of the antenna array include beam parameters and a beam parameter dependent beam gain function. The beamforming processing apparatus includes circuitry configured for calculating cumulative distribution functions of beam gain based on the probability density functions and the beam gain function and based thereon one or more optimal values of beam parameters defining an optimal beam by maximizing a first optimization parameter defined based on the one or more cumulative distribution functions subject to a minimum value of a second optimization parameter.